Results 71 to 80 of about 1,936 (209)

Precipitation of niobic acid from potassium niobate in sulphuric acid solution: A route to niobium oxide

The Canadian Journal of Chemical Engineering, EarlyView.
Graphical abstract illustrating the niobic acid precipitation process applied and the product obtained. Abstract This study investigates the precipitation of niobic acid (Nb2O5.nH2O) from potassium niobate solution with addition of sulphuric acid, and its subsequent thermal conversion into niobium oxide (Nb2O5). Thermodynamic modelling with PHREEQC and
Cássia R. Souza, Gabriela C. Silva, Isabel P. Silva, Frederico M. Penha, Sônia D. F. Rocha   +4 more
wiley   +1 more source

The impact of poloidal asymmetries on tungsten transport in the core of JET H-mode plasmas

, 2015
Recent progress in the understanding and prediction of the tungsten behaviour in the core of JET H-mode plasmas with ITER-like wall is presented. Particular emphasis is given to the impact of poloidal asymmetries of the impurity density.
Ericsson, Göran,, Skiba, Mateusz,, Angioni, C.,, Weiszflog, Matthias,, Zychor, I.,, Conroy, Sean,, Hjalmarsson, Anders,, Sjöstrand, Henrik,, Cecconello, Marco,, Dzysiuk, Natalia,, Andersson Sundén, Erik,, Possnert, Göran,, Eriksson, Jacob,, Militello Asp, Emilia,, Binda, Federico,, Hellesen, Carl,   +15 more
core   +2 more sources

Carbon monoxide adsorption on NaY zeolite and impregnated with 5% niobium: Characteristics and fixed‐bed study

The Canadian Journal of Chemical Engineering, EarlyView.
Schematic of the CO adsorption process in a fixed‐bed column containing pure NaY zeolite and Nb‐modified NaY (NaY–5%Nb). On the left, breakthrough curves and temperature profiles highlight the dynamic performance and thermal effects during CO adsorption.
Elson Oliveira, Karina Querne de Carvalho, Erika Pereira Felix, Roberta C. P. Rizzo‐Domingues   +3 more
wiley   +1 more source

Experimental study on metallic impurity behavior with boronization wall conditioning in EAST tokamak

Nuclear Materials and Energy
Operation of EAST tokamak with full metal wall without any wall conditioning are attempted in 2023 and 2024 experimental campaign to address the issues related to ITER tungsten wall operation. It is found that H-mode plasma could be sustained even with a
Yunxin Cheng, Ling Zhang, Ailan Hu, Shigeru Morita, Wenmin Zhang, Chengxi Zhou, Darío Mitnik, Fengling Zhang, Jiuyang Ma, Zhengwei Li, Yiming Cao, Haiqing Liu   +11 more
doaj   +1 more source

Radiation-front position control with scenario adjustments during the first tungsten divertor operation on KSTAR

Nuclear Fusion
This study reports the first experimental demonstration of a radiation front-based detachment control system during the initial tungsten divertor campaign in KSTAR.
C.S. Byun, S. Oh, S.K. Kim, B.S. Kim, Y.S. Han, S.H. Hahn, H.H. Lee, A. Jalalvand, Y.H. Lee, J.H. Hwang, R. Shousha, J.-S. Park, E. Kolemen   +12 more
doaj   +1 more source

Heat Load Mitigation Studies in the W7‐X Stellarator Experiment

Contributions to Plasma Physics, EarlyView.
ABSTRACT During the experiments at the stellarator Wendelstein 7‐X (W7‐X) with fully water‐cooled plasma‐facing components (PFC), including carbon‐fiber composite (CFC) divertor targets with a thermal load capability of 10 MW/m2, high performance was achieved.
Dirk Naujoks, Amit Kharwandikar, Jasper Dettmar, Michael Endler, Joris Fellinger, Yu Gao, Joachim Geiger, Marcin Jakubowski, Thomas Sieber, Sebastian Thiede, Christian Voß, W7‐X Team   +11 more
wiley   +1 more source

First SOLPS‐ITER Simulation Study of Japanese DEMO on Leakage of Seeded Ar Impurity

Contributions to Plasma Physics, EarlyView.
ABSTRACT For JA DEMO, one of the grand challenges is efficiently handling the extreme power loads onto plasma‐facing components, particularly the divertor targets. Impurity seeding is an essential strategy for increasing the radiation losses and thereby reducing the heat load on the targets.
Hang Si, Gakushi Kawamura, Nobuyuki Asakura, Kazuo Hoshino, Haruki Seto, Yoshiteru Sakamoto, Masatoshi Yagi   +6 more
wiley   +1 more source

Achievement of Transition Metal Chalcogenides/Oxides in Hydrogen Production by Seawater Electrolysis

EcoEnergy, EarlyView.
Transition metal chalcogenides (TMCs)/oxides have shown great application potential in seawater splitting for hydrogen generation due to their adjustable electronic properties, abundant active sites, and excellent catalytic performance. ABSTRACT Under the impetus of global “dual carbon” goals, green hydrogen has become a key component of the future ...
Xiaohui Du, Xinyu Li, Jianna Li, Tao Sun
wiley   +1 more source

A Review of Grain Boundaries: Formation Mechanism, Synthesis Strategy, and Application in Electrocatalysis

EcoEnergy, EarlyView.
An overview of grain boundary engineering in the field of electrocatalysis. ABSTRACT Key electrocatalytic reactions such as HER, OER, ORR, CO2RR, and NRR offer promising routes for storing renewable energy as chemical fuels. However, their widespread application is constrained due to the lack of highly active and stable catalysts. Grain boundaries (GBs)
Jingyu Gao, Fengming Zhou, Xinying Li, Ying Deng, Zexing Wu, Siyuan Feng, Yujing Zhu, Dan Zhang, Zhenyu Xiao   +8 more
wiley   +1 more source

Monitoring of two-dimensional tungsten concentration profiles on the HL-2A tokamak

, 2022
In this article, we demonstrate the inference of two-dimensional tungsten concentration profiles in tokamak plasmas, using Gaussian process tomography applied to bolometry and assuming a specific model for the tungsten cooling factor.
Mazon, Didier, Wang, Tianbo, Han, Mingkun, Zou, Xiao-Lan, Li, Hui, Fang, Kairui, Verdoolaege, Geert, Min, Jiang, Zhang, Kai, Yang, Zengchen, Gao, Jinming, Xu, Jianqiang, Xiao, Guoliang, Dong, Chunfeng, Li, Bingli, Zhu, Yiren, Zhong, Wulyu, Zhang, Yipo   +17 more
core   +1 more source